When you install an Interpet Airvolution Aquarium Air Pump, its not just your fish wholl be getting a treat. Your fish will flourish with the fresh, clean air this airpump provides them with, and youll be delighted at the almost silent operation. Airvolution air pumps are carefully built to avoid any excess noise. They have an inlet noise suppressing chamber and tubing and a high quality moulded case to absorb sound. Anti-vibration feet add to the list of ways this hard-working air pump keeps itself quiet for you. And it doesnt only sound good; it looks good too. The stylish and discreet case is good-looking enough for you to keep out in the open if you choose. And of course, your fish will be delighted. Powerful air flow keeps the water well aerated, and a combination of fine white and carbon filters mean better air quality to keep your fish happy and healthy. The AV range is suitable for powering an aquarium filter from 46 cm (18″) long to 150cm (60″) long, as well as a range of different airstones or airwalls. If you have large/messy fish, marines, goldfish or fish which prefer strong water movement, then choose a more powerful air pump. Available in 5 sizes (Mini, One, Two, Three and Four)